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Old 09-01-2013, 06:41   #1
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Is a 2500W inverter Enough To Drive a 1000W Drill?

I've experimented with the above but it keeps tripping out - which can damage my batteries I've been told (AGM and very hardy). Which 'multiplier' should I select?

thnx

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Old 09-01-2013, 11:19   #2
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Re: Is a 2500W inverter Enough To Drive a 1000W Drill?

If the Inverter is not pure sinewave and the drill is variable speed they are quite likely not compatible.
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Old 09-01-2013, 11:30   #3
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Re: Is a 2500W inverter Enough To Drive a 1000W Drill?

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Originally Posted by Shanaly View Post
I've experimented with the above but it keeps tripping out - which can damage my batteries I've been told (AGM and very hardy). Which 'multiplier' should I select?

thnx

J
Possibly the main issue would be the size of the battery bank to support the power draw.

I suspect, inverters trip when batteries get down to low voltages.
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Old 09-01-2013, 11:52   #4
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Re: Is a 2500W inverter Enough To Drive a 1000W Drill?

1000w drill? you mean like over 1hp? really? or have it got this wrong....
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Old 09-01-2013, 12:50   #5
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Re: Is a 2500W inverter Enough To Drive a 1000W Drill?

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Originally Posted by Andina Marie View Post
If the Inverter is not pure sinewave and the drill is variable speed they are quite likely not compatible.
My 15yr old Heart 2000 has no problem powering my 1/2" variable speed Makita.
9 amps running is about 1000w, surge on the inv. easily handle inrush current.
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Old 09-01-2013, 12:59   #6
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Re: Is a 2500W inverter Enough To Drive a 1000W Drill?

I suspect Amnesia is right. But check your connections and make sure there is no high resistance anywhere. Get everything clean and tight. It might make a difference. Otherwise, more or bigger batteries.

Assuming a perfectly efficient inverter for simplicity, and zero line losses, 1000 watts at 110VAC would be... 9.09 amps. The DC side, at 12VDC, would be oh... 83 amps. Quite a bit of current. When you DO figure some line losses and internal resistance in the batts, you could have a significant voltage drop which might be enough to trip most modern inverters. Don't pick at my figures I know they are imprecise. Just showing how you could have a high enough current on the 12V side that a very small resistance could be enough to make a significant voltage drop. I might not be illustrating this quite right but I think you get the idea.
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